Will Blender support design and dimensioning machine drawings?
While blender is more adapted to creative modeling than technical or precision modeling you can create mechanical models and use them to create good looking blueprints.

In this youtube tutorial, the measrueit addon (included with 2.78 or can be manually installed on older versions) is used to create the measurement lines. The lines and annotations don't show in a normal render, but the addon provides a way to create a render with measurements.



Freestyle can also be used to create outlines for blueprints. This blendertuts tutorial explains how to define solid and dashed linestyles to get a hidden edge blueprint result. It is also possible to get more of a hand sketched result.



The CGCookie archives also has an old tutorial that manually creates text objects and lines to get the following blueprint.